Hi Alan.
Yes I looked at Mathematica even read a paper about its internal
implementation and that it is at its core basically a rewrite system!
(I also mentioned that in my proposal)
this commutative rule would cause an infinite loop because x and y match to
anything. So the result of applying the rule will be given to the rule and
on and on ...
This is a hard thing for rule based systems.
but I plan to have generic rules classes of operations.

Thanks for your feedback


On Wed, May 29, 2013 at 6:21 PM, Alan Thompson <thompson2...@gmail.com>wrote:

> Hi - This looks great!  Did you look at Mathematica at all?  They have
> been doing symbolic algebra for many years, and you might get some ideas
> there.
>
> Also, I noticed that you don't have any commutative rules listed, eg:
>
> (rule ['+ x y]  :=>  ['+ y x])
>
> Wouldn't this reduce some of the duplication in your rules example?
> Good luck!
> Alan Thompson
>
>
> On Wed, May 29, 2013 at 8:29 AM, David Nolen <dnolen.li...@gmail.com>wrote:
>
>> A very cool of use of core.logic, look forward to seeing where it goes :)
>>
>>
>> On Wed, May 29, 2013 at 11:10 AM, Maik Schünemann <
>> maikschuenem...@gmail.com> wrote:
>>
>>> Hello,
>>> I am glad to announce that my proposal got accepted for google summer of
>>> code.
>>> I am doing the algebraic expression project idea which could lay the
>>> foundation for a clojure CAS System by providing a library to manipulate
>>> expressions syntactically
>>> and also solving equations and optimizing them for evaluation on top of
>>> core.matrix.
>>>
>>> I have created a blog post in which I explained it in more detail and
>>> also the design decisions I have to make in the beginning, such as how to
>>> represent an expression,
>>> a rule, how to deal with core.logic ...
>>> http://kimavcrp.blogspot.de/201blog
>>> post3/05/gsoc-project-algebraic-expressions-pre.html<http://kimavcrp.blogspot.de/2013/05/gsoc-project-algebraic-expressions-pre.html>
>>>
>>> Please comment if you have feedback or feature request or have a
>>> concrete use case for what you would want to use it. The more feedback I
>>> get the better I can make the
>>> library.
>>>
>>>
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